Cxc Corporation

Other

Gary A Nelson

Patrick N Godding

Richard E Schumaker

Stillman F Gates

Everett O Rigsbee, Iii

Keith D Walter

Edward S Marrone

Michael D Teener

Stillman E Gates

An electrical pickup for use with a stringed musical instrument is disclosed, as well as a stringed musical instrument employing such a pickup. The pickup is formed of a plurality of magnetoresistive elements, whose electrical resistance decreases as the magnitude of a surrounding magnetic field increases. A first pair of the magnetoresistive elements form two opposite legs of a Wheatstone bridge, and a second pair forms the remaining legs. The magnetoresistive elements forming the two pairs are electrically opposite one another, but are physically located side by side. The first pair is located on a first side of the vibrating string, and the second pair is located on the other side. A magnetic field is established which interacts with the magnetoresistive elements. The pickup is positioned so that the vibration of the string causes perturbations in the magnetic field, which in turn alter the resistance of the magnetoresistive elements. When a DC voltage is applied across the input terminals of the Wheatstone bridge, an output voltage signal is developed across the output terminals that varies with the changing resistance of the magnetoresistive elements. Because the resistance of the magnetoresistive elements changes with the instantaneous position of the vibrating string, the output voltage is representative of the vibration of the string.

Transducer and musical instrument employing the same

A large scale integrated circuit device is disclosed that can be used as a component in a variable bandwidth branch exchange system or for other applications utilizing programmable network switching. The device contains a plurality of duplex per line switches (PLS). Each PLS interfaces between serial signal streams which may operate at various rates. Date transfers are programmable to occur at variable times with reference to the information highway timing and are programmable in length. The device may be controlled and monitored by an external device, and can optionally transfer control and status information between an external control device and one or more station devices.

Data communications switching device having multiple switches operating

The present invention provides a communications system that improves upon the availability of communications paths between devices and simplifies the connectivity requirements to communicate data and control information to and from a remote station. System nodes are provided which are disposed along a time multiplex network signal stream. The nodes serve to interface remote stations to the network signal stream and may also switch information to different stations connected to the same node. The nodes are operative to allocate a variable bandwidth of the network signal stream for data communications between devices connected to different nodes. The nodes include switching devices that may be configured to accommodate stations that operate at different speeds. Allocation of bandwidth may be dynamically varied such that system resources are not unnecessarily diverted. Control of bandwidth allocation and internal switching within the node is accomplished via control information communicated to and from the node. Such control information may be contained within the network signal stream and decoded by the node or communicated to the node via a dedicated control communications line. Control information may be encoded into the signal stream communicated between the system node and the remote station. Thus, communication of data and control signals between the stations and the system node does not require complex wiring. Accordingly, individual stations may be more conveniently located.

Variable bandwidth switching system

A large scale integrated circuit device is disclosed that can be used as a component in a variable bandwidth branch exchange system or for other applications utilizing programmable serial data rate conversion. The device can be a serial information interface between a system node and the voice and data channels in a telset or other similar data communications device. The device may be controlled and monitored by an external device such as a microprocessor, and can transfer control and status information between the external control device and the system node.

Microtelephone controller

A communications switching system is provided for transferring information between a plurality of node information highways (66,68) and between node information highways (66,68) and station ports (284,286), the system (221) comprising a plurality of switches (243) each switch having a station to highway section (244) and a highway to station section (246), each section (244,246) being in electrical communication with a station port (284,286) and with a plurality of node information highways (272,274). The station to highway section (244) and highway to station section (246) are each independently and dynamically configurable to communicate a selected bandwidth of information between the station ports and a selected node information highway. Each section (244,246) further being operative to serially integrate control information into the data stream communicated to the station port, and to derive control information from the serial signal stream received from the station port. Thus, connectivity requirements between the station device and the network signal stream are simplified and greater utilization of the network signal stream is possible.

Integrated voice/data/control switching system

A variable bandwidth branch exchange system is disclosed for interfacing a network ring to a plurality of peripheral loops, each of the peripheral loops being connected to one or more local stations and to a node on the network ring. Time bit slots on the network ring signal stream are assigned, on a dynamic basis, for communication between local stations. The network ring signal stream is diverted to the peripheral loop by the node when the bit slots assigned to the local station connected to that loop become accessible at the node, thereby placing the peripheral loop in the network ring signal stream. Bit slot bandwidth is variable in accordance with the requirements of a particular local station. Voice, data, and image communications are supported. The modular nature of the system permits the implementation of multiple rings for wide area networking.

Growing community of inventors

Irvine, CA, United States of America

Gary A Nelson